chore: update readme (#149)

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<details open="true"><summary>Generated summary (powered by <a href="https://app.graphite.dev">Graphite</a>)</summary>

> ## TL;DR
> The README file for the "ogre" repository has been updated to include information about using json-patch RFC6902 for representing diffs. It also lists features such as reset, diff, and visualization via `@dotinc/ogre-react`. Additionally, there are plans for future updates including recursive merging.
> 
> ## What changed
> - Updated README file with information about using json-patch RFC6902 for representing diffs
> - Added features like reset, diff, and visualization via `@dotinc/ogre-react`
> - Mentioned plans for future updates including recursive merging
> 
> ## How to test
> - Review the updated README file in the "ogre" repository
> - Test the reset, diff, and visualization features using `@dotinc/ogre-react`
> - Stay tuned for future updates related to recursive merging
> 
> ## Why make this change
> - Provide users with information about representing diffs using json-patch RFC6902
> - Enhance user experience with features like reset, diff, and visualization
> - Plan for future updates to improve merging capabilities, including recursive merging
</details>
<!-- GITHUB_RELEASE PR BODY: canary-version -->
<details>
  <summary>📦 Published PR as canary version: <code>Canary Versions</code></summary>
  <br />

  ✨ Test out this PR locally via:
  
  ```bash
  npm install @dotinc/ogre@0.4.1-canary.149.8029125690.0
  npm install @dotinc/ogre-react@0.4.1-canary.149.8029125690.0
  # or 
  yarn add @dotinc/ogre@0.4.1-canary.149.8029125690.0
  yarn add @dotinc/ogre-react@0.4.1-canary.149.8029125690.0
  ```
</details>
<!-- GITHUB_RELEASE PR BODY: canary-version -->

README.md

@@ -1,7 +1,7 @@
 # ogre
 
 An in-memory git-like repository for objects for when you need to
-keep the history around for a bit longer.
+keep the history around for a bit longer. The library uses json-patch RFC6902 for representing diffs.
 
 [![codecov](https://codecov.io/gh/dotindustries/ogre/branch/main/graph/badge.svg?token=23M014CWLK)](https://codecov.io/gh/dotindustries/ogre) [![Test coverage](https://github.com/dotindustries/ogre/actions/workflows/coverage.yml/badge.svg)](https://github.com/dotindustries/ogre/actions/workflows/coverage.yml)
 
@@ -11,9 +11,11 @@ keep the history around for a bit longer.
 - Branch
 - Tags
 - Checkout
+- Reset (soft and hard)
+- Diff
 - Visualization via `@dotinc/ogre-react`
 - Merge
- - fast-forward
+  - fast-forward
 
 ## Usage
 
@@ -51,5 +53,5 @@ repo.checkout(init);
 ## TODO
 
 - [ ] Merge
- - [ ] recursive
- - [ ] octopus
+  - [ ] recursive
+  - [ ] octopus